CMX4GX3M2A1600C9
1600Mhz 4GB (2x2GB) 9-9-9-24 1.65V Ver 2.12
I also looked in the Motherboard vendors list, those moduals are listed there under 1600Mhz and listed as 1.65v, so they have been tested @ 1600Mhz @ 1.65v on my MOBO.
They should work at that, having said that my Motherboard is an AM3+ socket.